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Finding the Fourth Proportional to 309,595.50, 464,471.28 and 87,979.50

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Solution

The fourth proportional to 309,595.50, 464,471.28 and 87,979.50 is: 131,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,595.50 : 464,471.28 = 87,979.50 : x
  2. Step 2: Convert to fraction form
    309,595.50/464,471.28 = 87,979.50/x
  3. Step 3: Cross multiply
    309,595.50x = 464,471.28 × 87,979.50
  4. Step 4: Simplify right side
    309,595.50x = 40,863,950,978.76
  5. Step 5: Solve for x
    x = 40,863,950,978.76/309,595.50
  6. Step 6: Final answer
    x = 131,991.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.